Indonesian Experiences in Retrofitting of Some Milk Cooler Systems
Abstract
To overcome the ozone layer depletion problem, the Indonesian government has ratified the Montreal protocol and its amendments. The import of R-12 refrigerant to Indonesia has been banned since the end of 1997. Meanwhile, most of Indonesian milk cooling units use R-12. Therefore, it is expected that these cooling units have to be switched to other refrigerant soon. Almost all of Indonesian milk cooling units belong to small or medium dairy cooperatives that cannot aord to retrofit their systems to R-134a. In this research, a milk-cooling unit designed for R-12 was directly switched to propane/butane refrigerants (propane-isobutane, and propane/n-butane refrigerants) without any modification. The performances of the milk-cooling unit operated with propane/isobutane, propane/n-butane and R-12 gefiigerants were investigated. It was found that propane/n~bntane reigerant is the most eicient, and followed by propane/isobutane and R-12. Results of several other milk cooling units were also reported.
References
milk cooling units were also reported.
Ref:
Ardiansyah, W, 1994, Application of Propane n-Butane Mixture as R-12 Refiigerant Substitute, Bandung, Institute of Technology Bandung, (Indonesian).
Suwono, A., Samudro, H.M. Tandian, N., and Ardiansyah, W., 1995, Theoretical and Experimental Study of the Aplication of proipane/n-butane Mixture as Refrigerant Replacing R-12, 19"" International Congress of Refrigeration Proceedings, Vol. IVa, p. 552
Suwono, A., Pasek, A.D., and Tandian, N.P., 1996, Development of the Application of Propane/n-Butane Mixture as CFC-Refrigerant Substitute, Seminar on Altemative Refrigerants, Bandung, (Indonesian).
---------, 1981, International Standard ISO 5708: Refrigerated Bulk Milk Tanks, ISO, Switzerland."f
